F 150 OD trans

The original post is about an F150 transmission. The post regarding adapter parts from Macs may be a bit misleading. The Mac adapter is for T-5's and those are different from the F150. Perhaps the adapter will work for both but that isnt indicated on the Mac website.
 
What are the ratios in the F150 coghouse? I wouldn't be interested unless top is about 26% O/D. I assume the T5 has a top gear that is an O/D. True/false?
 
Syncro, I assume you are refering to OD ratios.
Depends on which engine was underthe hood. The 302 c i engine had the 26.7% ratio, which in Ford terms was .78 to 1 ratio.
The L-6 (6 cyl) engine had the 37.9% ratio (.72 to 1 ratio) and the 41.1% ratio (.71 to 1)
The large V-8 (large at that time period) had the 41%.
The ratio of OD was directly related to the torque put out by the enging rather than its HP.
In the 20 years I built these OD kits I only built two that did not have the 26.7% OD. Both were 37%. One was used in my speedster due to its beter first and second gear ratio and the other in now in my frieds Tudor.



know nuttin about the T5, cept I dont want one. kenp
 
Also , if using the F150 or other setup, check the caster angle at the axle (4-5 deg per later Ford service specs) with the AA housing and if Float A Motor mounts. The radius ball clamp may need some fine tuning.
 
klawockvet said:
The original post is about an F150 transmission. The post regarding adapter parts from Macs may be a bit misleading. The Mac adapter is for T-5's and those are different from the F150. Perhaps the adapter will work for both but that isnt indicated on the Mac website.
Click to expand...


This picture is from Macs website.


Bob
 

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Klaworkvet, to answer your question about F150 Tremec RTS 4 spd OD parts available from Mac's Speed Shop in New Zealand .... Yes they do make a bell housing and a rear adapter plate for the F150 conversion. Please see the email reply below:



Subject: Mac's Speed Shop: F150 Trans to Model A 4 cylinder engine
Priority: Normal Date: Tuesday, March 19, 2019 12:55 AM Size: 5 KB Hi Albert, you are correct these parts are for the Ford Tremec RTS 3+1 overdrive and NOT the S10 t-5 trans. Cheers Graeme -----Original Message----- From: alberry Sent: Tuesday, 19 March 2019 2:57 p.m. To: Graeme McNeil Subject: Re: Mac's Speed Shop: F150 Trans to Model A 4 cylinder engine Greame, the parts you listed below, are they for the Tremec RTS 4 spd OD transmission or they they for the T5 S10 Brazer 5 spd transmission? I couple of people are questioning me about the use of those two parts..................AL Berry in Newburgh, NY ---- Graeme McNeil <graeme@macsspeed.com> wrote: ============= Hi Albert, prices as follows in US$. I prefer pay-pal for payment. MSSC01 model A-B to Ford $465.00 MSSG06 Torque tube adaptor $175.00 International Courier 2-6 days $240.00 This includes Insurance Total US$880.00
 
I did the F150 conversion 2 years & 3200 miles ago using Mac’s Speed bell housing & rear adapter.With this setup it was 3&5/64 inches longer. I had to remove just a small amount of the cross member front lip.I liked having the pedal shaft mounted like original.A friend of mine has a 31 PU he had installed the Mitchell overdrive,after driving my Fordor he wished he had the F150.
 
Royb: Ten years ago I did my own F150 build/install using the AA bellhousing. I had to shorten the input shaft 5/8" to get the Tremec RTS to fit the AA bellhousing. You used the Mac's bellhousing. Did you have to shorten the input shaft? Just curious because Mac's parts would make the install much easier for the do-it-yourselver
 
The Tremec T170 RTS is getting harder and harder to find in good condition. No new gears are available that I'm aware of. Most of the guys that deal with them hoard the parts for their kits. If a person goes looking for one, you have to know the two letter alpha code for the one you want and hope that it hasn't been abused.

These units were built for Ford by Tremec down in Mexico and they haven't been producing them for a long time. They will get harder to source parts for as the years go by unless someone starts fabricating new hard parts for them.
 
You do not have to shorten the input shaft with the Mac’s. bell housing just the output shaft.My 30 fordor was bought in the late 30’s by my Grandpa, my dad purchased it from him & I purchased it from him in 1971.it was original until 3 years ago when I restored it.I located 2 of the RTS BV trans to modify because I have 1 son & 2 grandsons to enjoy the car for years to come.
 
Al, I used the information from your post on shortening the driveshaft & torque tube ,Thanks it was very helpful.Also I would like to thank Ken Parker for his input over the phone with me, it helped even though he had never used that bell housing. This a great site with great minds to help solve problems.
 
Word of advice since I’m putting the f150 Tran in my coupe right now.

Using the Mac’s bellhousing you will need to get a lightened flywheel or machine the steps out of the side of the flywheel and the mill the front face flat of the flywheel. Basically just buy a v8 clutch setup with lightened flywheel to make it easy.

Cross member will need the a little cutting on the front side but it’s not that tragic.

Everything actually clears the mechanical brake cross bar so that’s a plus since my car is still mech brakes.

Cutting the torque tube, driveshaft and radius arms are easy. Total out of my car using the Mac’s bell was 3.5”.

At the moment I’m dealing with moser engineering on splining the shaft of the transmission. They have no recollection of doing these for others in the past. Mine is going out tomorrow to them but I’m sure they will be calling me again since I just walked the guy through what I needed and emailed detailed pictures.

Just my $0.02 from a 32 year old. :)
 
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Royb; That's what I thought about using the Mac's flywheel, no need to shorten the input shaft. That's the extra 5/8" in the overall length. Thanks for the good words. I'm glad I was able to help.
 
"At the moment I’m dealing with moser engineering on splining the shaft of the transmission. "They have no recollection of doing these for others in the past."

I don't understand this. I just got two of them back last week from Moser. And I have had a couple others done in past few years. They cut them to length, splined and drilled/tapped the end for the u-joint. I send them a Model A rear transmission shaft and a u-joint to use as reference/guide. Never had any problem getting them to do it or with their work. They can no longer spline the drive shaft because it is too long for their equipment.
 
MAG. The gentleman I spoke to (Colton) from moser said he showed the machinist there and said yea he can do it but I don’t know how he seemed like I was asking for something so crazy. Hopefully they can get it done after they see what’s in the box. I too sent the old model a shaft and u-joint so when the machinist sees everything it should click in his head.
 
John, they told me about a month ago that they could no longer spline a Model A drive shaft due to its length. He (Mike or Mark?)said they changed their equipment recently and the drive shaft is too long to fit in their machine. They have done them for me in the past. Might be best to check before sending them one. Had mine shortened, re-tappered, and key slot cut on the pinion end.
 
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